Several significant ideas have come down to us from Heraclitus. One is pyr aeizoon.
Edinger identifies pyr aeizoon as one of the central surviving concepts of Heraclitean philosophy, positioning it as foundational to the depth-psychological reading of pre-Socratic thought.
, The Psyche in Antiquity, Book One: Early Greek Philosophy From Thales to Plotinus, 1999thesis